You can raise your self-esteem by changing your thoughts about yourself using affirmations and other brainwashing techniques. However, self-esteem is a feeling, not an idea, and it is eventually your feeling about yourself that needs to be changed.
The way you feel is influenced by what you think. If you think that something is dangerous, you will feel scared. If you think that something is fun, you will feel happy. Similarly, if you think that you are a beautiful person, you will feel like a wonderful person. Thoughts of high self-esteem lead to feelings of high self-worth.
Training your mind to think more positive thoughts about yourself is therefore significant, but it is not enough. You don’t necessarily have high self-esteem just because you have learned to think positively about yourself. You need to know that you are wonderful not only in your head but also in your heart. You need to FEEL that you are valuable. Real self-esteem is a feeling.